Thermal stability of the spin injection in Co/Ag/Co lateral spin valves

• 来源期刊: 中国物理B（英文版）
• 关键词: spin injection spin diffusion length Co/Ag contact lateral spin valve
• 年，卷（期）: 2018,（9）
• 页码范围: 562-567
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/9/097202

摘要

Spin injection,spin diffusion,and spin detection are investigated in Co/Ag/Co lateral spin valves at room temperature.Clear spin accumulation signals are detected by the non-local measurement.By fitting the results to the one-dimensional diffusion equation,～8.6％spin polarization of the Co/Ag interface and～180 nm spin diffusion length in Ag are obtained.Thermal treatment results show that the spin accumulation signal drastically decreases after 100℃ annealing,and disap-pears under 200℃ annealing.Our results demonstrate that,compared to the spin diffusion length,the decrease and the disappearance of the spin accumulation signal are mainly dominated by the variation of the interfacial spin polarization of the Co/Ag interface.